Two Cylinders Are Connected by a Small Tube Which Has

Multiple Choice

Two cylinders are connected by a small tube which has a needle valve in the middle. One cylinder contains ⁴He gas, and the other cylinder contains CO₂ gas. The gases are at the same temperature, pressure and volume. The lids that seal the gases in are free to move up or down. When the valve is opened, what happens to the volume in each cylinder?

A) The volumes do not change.
B) The CO₂ volume decreases and the ⁴He increases.
C) The CO₂ volume increases and the ⁴He decreases.
D) What happens depends on the initial temperature.
E) What happens depends on the initial pressure.